General Biology a book of Outlines And Practical Studies for the General Studen
General Biology a book of Outlines And Practical Studies for the General Studen
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In our eReader you can find the full English version of the book. Read General Biology a book of Outlines And Practical Studies for the General Studen Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book General Biology a book of Outlines And Practical Studies for the General Studen
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clearly delimits bark and wood. In the bark there is a copious development of bast fibres, that protect underlying protoplasmic parts (fig. ()ic). The vessels of the wood are pitted vessels, and not spiral; and, most striking of all, the bundles are very numerous and very closely crowded together. Obviously such weak and isolated vessels as those of the chickweed, while capable of conducting water, are of little use for support.
The pitted vessels constitute the frame work around which is built... the woody skeleton of the box elder tree. Wood, as we ordinarily know it, is composed of these vessels and of wood fibres, and wood fibres are made out of the paren- chyma cells which we" have hitherto seen forming the pack- ing around and between the bundles. The cells lying be- tween the vessels become elongated, lignified in their walls ORGANIC EVOLUTION 147 and consolidated by their over-lapping pointea ends and form the longitudinal wood fibres. The cells lying between the bundles become transversely elongated, and form the wood fibres of the medullary rays.
What to read after General Biology a book of Outlines And Practical Studies for the General Studen?
You can find similar books in the "Read Also" column, or choose other free books by James George Needham to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
clearly delimits bark and wood. In the bark there is a copious development of bast fibres, that protect underlying protoplasmic parts (fig. ()ic). The vessels of the wood are pitted vessels, and not spiral; and, most striking of all, the bundles are very numerous and very closely crowded together. Obviously such weak and isolated vessels as those of the chickweed, while capable of conducting water, are of little use for support.
The pitted vessels constitute the frame work around which is built... the woody skeleton of the box elder tree. Wood, as we ordinarily know it, is composed of these vessels and of wood fibres, and wood fibres are made out of the paren- chyma cells which we" have hitherto seen forming the pack- ing around and between the bundles. The cells lying be- tween the vessels become elongated, lignified in their walls ORGANIC EVOLUTION 147 and consolidated by their over-lapping pointea ends and form the longitudinal wood fibres. The cells lying between the bundles become transversely elongated, and form the wood fibres of the medullary rays.
What to read after General Biology a book of Outlines And Practical Studies for the General Studen?
You can find similar books in the "Read Also" column, or choose other free books by James George Needham to read onlineMoreLess
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